This project parses the German Wiktionary HTML dump (right now only to extract Czech-German data) into JSON that can easily be used in any application.
Besides using the the HTML dump it also scrapes some pages, because the Flexion namespace in the German Wiktionary is not included the HTML dump (hopefully this will change), it has some code to also scrape them.
Other projects parsing the German Wiktionary use the XML dump, but this has the downside of not getting any data from expanded templates. For many languages the inflections are not manually typed in, but instead generated by a Lua template. These can only be accessed by parsing the HTML directly (using beautifulsoup). (The other option would be expanding the templates manually, which takes more CPU power and is pretty difficult to implement - for English the wikitextprocessor has been developed to do this for example)
You should download the newest dewiktionarydump-NS0 dump from https://dumps.wikimedia.org/other/enterprise_html/runs/
Then should clone the project, install poetry and then run poetry install. You can run python files like poetry run python main.py. Main.py downloads the basic data from HTML dump. Scrape_category_html.py downloads and parses the Flexion pages that are not included in the HTML dump. Generate_dictionary.py generates a Tabfile dictionary, but this can be changed to one of the many output formats that pyglossary supports.
For the English wiktionary I can recommend https://kaikki.org/, which has parsed the Wiktionary data in a great format and also retains all grammatical information for inflections, among other things.